package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {


    @Autowired
    private DishFlavorService dishFlavorService;

    /**
     * 新增菜品
     *
     * @param dishDto
     */
    @Override
    @Transactional
    public void saveWithFlavor(DishDto dishDto) {
        this.save(dishDto);//保存菜品的基本信息到菜品表dish

        Long id = dishDto.getId();//菜品id
        //菜品口味(将菜品id封装到口味表单中)
        List<DishFlavor> flavors = dishDto.getFlavors();
        flavors = flavors.stream().map((item) -> {
            item.setDishId(id);
            return item;
        }).collect(Collectors.toList());

        //保存菜品口味数据到菜品口味表dish_flavor
        dishFlavorService.saveBatch(flavors);


    }

    /**
     * 查询菜品信息包括口味信息
     *
     * @param id
     * @return
     */
    @Override
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表查询
        Dish dish = this.getById(id);

        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish, dishDto);
        //查询当前菜品对应的口味信息，从dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId, dish.getId());

        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);

        dishDto.setFlavors(flavors);
        return dishDto;
    }

    /**
     * 修改菜品信息，包括口味
     *
     * @param dishDto
     */
    @Override
    public void updateWithFlavor(DishDto dishDto) {
        //更新dish表基本信息
        this.updateById(dishDto);

        //清理当前菜品对应口味数据---dish_flavor表的delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.eq(DishFlavor::getDishId, dishDto.getId());
        dishFlavorService.remove(queryWrapper);
        //添加当前提交过来的口味数据---dish_flavor表的insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();

        //用stream流的方式将菜品id设置到flavors表中
        flavors = flavors.stream().map((item) -> {
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());

        dishFlavorService.saveBatch(flavors);

    }

    /**
     * 删除菜品，包括口味，可批量删除
     *
     * @param ids
     */
    @Override
    @Transactional
/*    public void deleteWithFlavor(Long[] ids) {
        for (Long id : ids) {
            super.removeById(id);//先删除dish表数据
            LambdaQueryWrapper<DishFlavor> queryWrapper=new LambdaQueryWrapper<>();
            queryWrapper.eq(DishFlavor::getDishId,id);//根据dish表的id在dish_flavor表中查找对应的dish_id;

            List<DishFlavor> list = dishFlavorService.list(queryWrapper);

            for (DishFlavor flavor : list) {
                dishFlavorService.removeById(flavor.getId());
            }
        }
    }*/
    public void deleteWithFlavor(List<Long> ids) {
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(Dish::getId, ids);
        queryWrapper.eq(Dish::getStatus, 1);
        int count = this.count(queryWrapper);

        if (count > 0) {
            throw new CustomException("菜品正在售卖中,不能删除");
        }
        this.removeByIds(ids);


        //删除套餐对应口味表dish_flavor的信息

        LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.in(DishFlavor::getDishId, ids);
        dishFlavorService.remove(lambdaQueryWrapper);
    }


}